Three-dimensional gestures

ABSTRACT

In one embodiment, a method includes identifying a gesture made by a user of the computing device with respect to one or more surfaces of the computing device, the gesture comprising a single trajectory in three dimensions including: an earlier portion in a first direction along at least one of the surfaces; and immediately following the earlier portion of the single trajectory, a later portion in a second direction comprising a second series of points distant from the surfaces, wherein the second direction comprises a deflection from the first direction that follows through on the earlier portion of the single trajectory; determining a user input based at least in part on a speed of the gesture along the earlier portion of the single trajectory and a speed of the gesture along the later portion of the single trajectory; and executing one or more actions based on the user input.

PRIORITY

This application is a continuation under 35 U.S.C. §120 of U.S. patentapplication Ser. No. 13/557868, filed 25 Jul. 2012.

TECHNICAL FIELD

This disclosure generally relates to user interface.

BACKGROUND

A touchpad is an input device including a surface that detectstouch-based inputs of users. A touch screen is an electronic visualdisplay that detects the presence and location of user touch inputs. Aproximity sensor is a sensor device that detect the presence of nearbyobjects without physical contact. A computing system (such as a mobilephone, a tablet computer, or a laptop computer) often incorporate thosedevices to facilitate user interactions with application programsrunning on the computing system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example processing stack of a mobile device.

FIG. 2 illustrates an example mobile device.

FIG. 3 illustrates an example method for providing user inputs withthree-dimensional gestures.

FIG. 4A illustrates an example three-dimensional gesture.

FIG. 4B illustrates an example user interface of a music playerapplication.

FIG. 4C-4F illustrate another example three-dimensional gesture.

FIG. 4G illustrates an example user interface.

FIG. 4H illustrates yet another example three-dimensional gesture.

FIG. 5 illustrates an example network environment of a social-networkingsystem.

FIG. 6 illustrates an example social graph

FIG. 7 illustrates an example computer system.

DESCRIPTION OF EXAMPLE EMBODIMENTS

A touchpad is an input device including a surface that detectstouch-based inputs of users. Similarly, a touch screen is an electronicvisual display surface that detects the presence and location of usertouch inputs. So-called dual touch or multi-touch displays or touchpadsrefer to devices that can identify the presence, location and movementof more than one touch input, such as two- or three-finger touches. Asystem incorporating one or more touch-based input devices may monitorone or more touch-sensitive surfaces for touch or near touch inputs froma user. When one or more such user inputs occur, the system maydetermine the distinct area(s) of contact and identify the nature of thetouch or near touch input(s) via geometric features and geometricarrangements (e.g., location, movement), and determine if theycorrespond to various touch events or gestures (e.g., tap, drag, swipe,pinch).

Recognition of touch events by a system with one or more touch-basedinput devices—i.e., identifying one or more touch inputs by a user anddetermining corresponding touch event(s)—may be implemented by acombination of hardware, software, or firmware (or device drivers). FIG.1 illustrates an example processing stack of a mobile device (e.g., asmart phone, a tablet computer). In the example of FIG. 1, the mobiledevice may comprise hardware devices (120) such as Input-Output (I/O)devices (e.g., a touch screen, speakers, a light-emitting diode or LEDindicator, a camera, etc.), communication interface devices (e.g., acellular interface, a Wi-Fi interface), sensors (e.g., a GlobalPositioning System or GPS sensor, a proximity sensor, an accelerometer,etc.), and other hardware devices. One or more device drivers in driverlayer 102 hosted by one or more processors 110 of the mobile device cancommunicate and control the hardware devices. One or more processors 110can execute various software programs, for example, operating system 103running one or more application programs (e.g., web browser, addressbook, etc.) in applications 105 and managing one or more hardwaredevices via the one or more device drivers in driver layer 102.Libraries 104 can include one or more libraries used by one or moreapplication programs in applications 105. For example, the mobile devicemay comprise one or more device drivers communicating with one or moretouch-based input devices and detecting touch inputs. The system maycomprise a touch gesture library containing touch event modules orcomputer program code for interpreting touch inputs detected by thedevice drivers to touch events or gestures. A program running on themobile device can detect and process touch events by subscribing aslisteners to touch event modules in the touch gesture library.

In addition to detecting touch or near-touch inputs using one or moretouch input devices (e.g., touchpad, touch screen), a system may alsodetect a location and movement of an object at a distance away from thesystem's surface by incorporating one or more sensor or input devices.For example, a proximity sensor may detect the presence of nearbyobjects without physical contact. For example, a camera capturing asubstantially real-time video may determine a distance and angle of anobject (relative to the camera) in the video based on a focus distanceand angle associated with the object. This disclosure contemplates anysuitable sensors for detecting a location and movement of an objecttouching or at a distance away from the system's surface. A systemincorporating one or more touch input devices, proximity sensors, orcameras may determine a location and movement of an object touching orat a distance away from the system's surface based on measurements ofthe object by the touch input devices, proximity sensors, or cameras(e.g., by using triangulation techniques). By continuously monitoringthe touch input devices, proximity sensors, or cameras, the system maydetermine a three-dimensional trajectory of a moving object based onmeasurements of the object by the touch input devices, proximitysensors, or cameras. A user may provide inputs to the system byperforming three-dimensional gestures. For example, a three-dimensionalgesture may be the user's fingertip touching a front surface of thesystem and then pulling away from the front surface. When detecting sucha three-dimensional user input, the system may determine athree-dimensional trajectory (e.g., of the user's fingertip), anddetermine if the three-dimensional trajectory corresponds to one or morethree-dimensional gestures. The system may comprise a three-dimensionalgesture library containing three-dimensional input modules or computerprogram code for calculating and interpreting three-dimensional inputtrajectories (detected by the touch input devices, proximity sensors, orcameras) to three-dimensional gestures. A program running on the systemcan detect and process three-dimensional gestures by subscribing aslisteners to the three-dimensional input modules in thethree-dimensional gesture library.

FIG. 2 illustrates an example mobile device. In the example of FIG. 2,mobile device 200 may comprise a housing with a touch display 201disposed on a front side of the housing. Touch display 201 may be asingle-touch, dual-touch, or multi-touch display. Mobile device 200 maycomprise one or more additional touch input devices (e.g., touchpad,touch screen) disposed on a back side of the housing. This disclosurecontemplates any suitable placement of the additional touch inputdevices.

Mobile device 200 may comprise one or more proximity sensors 202disposed on the front side and the back side of the device's housing asillustrated in FIG. 2. This disclosure contemplate any suitable numberof proximity sensors at any suitable location of mobile device 200.

Mobile device 200 may comprise one or more cameras 203 disposed on thefront side and the back side of the device's housing as illustrated inFIG. 2. This disclosure contemplate any suitable number of cameras atany suitable location of mobile device 200. For example, in oneembodiment, mobile device 200 may have one cameras near the left edgeand another camera near the right edge of the front side of the device'shousing.

Mobile device 200 may comprise a touch gesture library containing touchevent modules or computer code that can recognize touch inputs, anddetermine one or more corresponding touch events or gestures (e.g., tap,draft, swipe, pinch). One or more applications hosted by mobile device200 may be configured to detect and respond to one or more touch eventsor gestures by subscribing as listeners to touch event modules in thetouch gesture library.

Mobile device 200 may comprise a three-dimensional gesture librarycontaining three-dimensional input modules or computer program code thatcan recognize three-dimensional inputs, and determine one or morecorresponding three-dimensional gestures. One or more applicationshosted by mobile device 200 may be configured to detect and respond toone or more three-dimensional inputs by subscribing as listeners tothree-dimensional input modules in the three-dimensional gesturelibrary.

Particular embodiments describe methods for providing user inputs withthree-dimensional gestures. Particular embodiments may detect andrecognize a three-dimensional gesture, determine a user input based onthe three-dimensional gesture, and execute one or more actions based onthe user input. FIG. 3 illustrates an example method for providing userinputs with three-dimensional gestures. The example method of FIG. 3 canbe implemented by an application (or an operating system) running on oneor more processors of a computing device. In particular embodiments, acomputing device may be a client device comprising one or more touchinput devices, proximity sensors, or cameras. The computing device maycomprise any suitable input devices or sensors that each can determine alocation or movement of an object. For example, a computing device maybe a mobile phone, a tablet computer, a handheld gaming console, aremote control, or any suitable computing device comprising one or moretouch input devices, proximity sensors, cameras, or any suitable inputdevices or sensors that each can determine a location or movement of anobject. For example, a computing device may be mobile device 200illustrated in FIG. 2. In particular embodiments, the application mayidentify a three-dimensional gesture made by a user with respect to oneor more surfaces of the computing device (STEP 301). The application maydetect and recognize the three-dimensional gesture by subscribing aslisteners to the three-dimensional input modules as described earlier.In particular embodiments, the three-dimensional gesture comprises atrajectory in three dimensions. A first portion of the trajectory maycomprise a touch of one or more of the surfaces, while a second portionof the trajectory may comprise a series of points in space distant fromthe surfaces.

FIG. 4A illustrates an example three-dimensional trajectory of a pullinggesture. A user may perform a pulling gesture by touching on a surfaceof the computing device with a fingertip (or any suitable object) andthen pulling (or lifting) the fingertip away from the surface. Asillustrated by the arrow of FIG. 4A, a three-dimensional trajectory ofthe pulling gesture may start at a first location (401) on a particularsurface of the computing device (e.g., the back side of mobile device200), and end at an end point (402) at a distance from the particularsurface of the computing device. This disclosure contemplates anysuitable surface of the computing device where a pulling gesture starts.

In particular embodiments, the application may determine a user inputbased on the three-dimensional gestures (STEP 302). In particularembodiments, the application may execute one or more actions based onthe user input (STEP 303). For example, the application may be a musicplayer application running on mobile device 200. The music playerapplication may display in touch display 201 user interface icons suchas speaker volume adjustment 405, play 406, pause 407, and stop 408, asillustrated in FIG. 4B. For example, a user of the computing device mayperform a pulling gesture as illustrated by the arrow in FIG. 4A. Themusic player application may identify the pulling gesture (e.g., bysubscribing as a listener to the three-dimensional input modules asdescribed earlier), and determine a user input for adjusting auser-controllable parameter of the music player application based on thepulling gesture. In particular embodiments, the application may select auser interface object at a location corresponding to the first locationof the pulling gesture's trajectory, and adjust a user-controllableparameter of the application indicated by the user interface object. Forexample, corresponding to the first location 401 (at the back-sidesurface of mobile device 200) of the pulling gesture's trajectoryillustrated in FIG. 4A, the music application may select speaker volumeadjustment icon 405 that is displayed in touch screen 201 and is in theopposite side to the first location 401. The music player applicationmay adjust speaker volume of the music player application, as indicatedby volume adjustment icon 405. The application may adjust theuser-controllable parameter based on a distance of the end point of thepulling gesture's trajectory away from the particular surface of thecomputing device. For example, the music player application may increasesound volume by 10 percent if the distance 403 (between the end point402 and the back-side surface of mobile device 200 illustrated in FIG.2A) is 1 centimeter, increase sound volume by 20 percent if the distance403 is 2 centimeter, increase sound volume by 30 percent if the distance403 is 3 centimeter, and so on.

In other embodiments, the pulling gesture illustrated by the arrow ofFIG. 4A may cause an application to preview content corresponding to auser interface icon. For example, in response to the pulling gesture asillustrated by the arrow of FIG. 4A, an operating system of mobiledevice 200 may select a user interface icon (e.g., a photo gallery)displayed on touch screen 201 at a position opposite to the firstlocation 401 (at the back-side surface of mobile device 200) of thepulling gesture's trajectory illustrated in FIG. 4A. The operatingsystem may display content corresponding to the user interface icon(e.g., thumbnails of photos included in the photo gallery) in an overlayframe displayed in touch screen 201. The operating system may adjust anumber of photo thumbnails displayed within the overlay frame (or a sizeof the overlay frame) based on a distance of the end point of thepulling gesture's trajectory away from the back-side surface of mobiledevice 200. For example, the operating system may display 4 photothumbnails if the distance 403 (illustrated in FIG. 2A) is 1 centimeter,8 photo thumbnails if the distance 403 is 2 centimeter, 16 photothumbnails if the distance 403 is 3 centimeter, and so on.

[27] In one embodiment, the application may adjust a user-controllableparameter without selecting a user interface object. For example, anoperating system of mobile device 200 may adjust screen brightness oftouch display 201 based on a user input of the pulling gestureillustrated in FIG. 4A. The operating system may identify a userperforming a pulling gesture illustrated in FIG. 4A, and determine auser input for adjusting screen brightness for the operating system'suser interface (e.g., a home screen) displayed in touch display 201. Theoperating system may decrease screen brightness of touch display 201 by10 percent if the distance 403 (illustrated in FIG. 4A) is 0.5 inch,decrease screen brightness of touch display 201 by 20 percent if thedistance 403 is 1 inch, and so on.

FIGS. 4C-4F illustrate an example three-dimensional trajectory ofanother example three-dimensional gesture for the example method of FIG.3. In particular embodiments, a user may perform a pinching gesture at afirst location 421 on touch screen 201 of mobile device 200, asillustrated in FIG. 4C. The user may perform a pulling gesture away fromfirst location 401 on touch screen 201, as illustrated by the arrow inFIG. 4D. The user may perform a movement distant from and across touchscreen 201 toward a second location 422 of touch screen 201 (asillustrated by the arrow in FIG. 4E), and perform a dropping gesture ontouch screen 201 at second location 422 (as illustrated by the star inFIG. 4F). A dropping gesture may be a tap gesture on touch screen 201.An application (or an operating system) running on mobile device 200 maydetect and recognize (e.g., by subscribing as listeners to thethree-dimensional input modules as described earlier) thethree-dimensional trajectory illustrated in FIGS. 4C-4F as apick-up-move-drop-down gesture (STEP 301). The application may determinea user input for drag-and-drop based on the pick-up-move-drop-downgesture (STEP 302). The application may, based on the user input ofdrag-and-drop, drag and drop a user interface object displayed in touchscreen 201 from a first point corresponding to first location 421 to asecond point corresponding to second location 422 (STEP 303). The userinterface object may be an icon, a frame, a selectable picture, or anysuitable user interface object. In one embodiment, an operating systemmay, based on the user input of drag-and-drop, drag and drop a userinterface object display in touch screen 201 from a first pointcorresponding to first location 421 and within a first window of a firstapplication (e.g., window 431 as illustrated in FIG. 4G), to a secondpoint corresponding to second location 422 and within a second window ofa second application (e.g., window 432 as illustrated in FIG. 4G). Thatis, the operating system may drag the user interface object from thefirst application's user interface and drop the user interface object tothe second application's user interface.

Note that the pick-up-move-drop-down gesture illustrated in FIGS. 4C-4Gmay comprise a pinching gesture at first location 421 on touch screen201, followed by a tap gesture at second location 422 on touch screen201 within a specified period of time (e.g., within 1.5 seconds). Thatis, the pick-up-move-drop-down gesture illustrated in FIGS. 4C-4G may bedetected by one or more touch input devices (e.g., touch screen 201),without triangulating measurement data from other sensors such as acamera or a proximity sensor. An application (or an operating system)running on mobile device 200 may detect and recognize thepick-up-move-drop-down gesture illustrated in FIGS. 4C-4G by subscribingas listeners to touch event modules as described earlier.

This disclosure contemplates any suitable surface of mobile device 200where a pick-up-move-drop-down gesture starts and ends. For example, auser may perform a pick-up-move-drop-down gesture by performing apinching gesture at a first location on the back-side surface of mobiledevice 200, a pulling gesture away from the first location on theback-side surface, a movement distant from and across the back-sidesurface toward a second location of the back-side surface, and adropping gesture on the back-side surface at the second location. Anapplication (or an operation system) running on mobile device 200 maydetect and recognize the pick-up-move-drop-down gesture by subscribingas listeners to the three-dimensional input modules as described earlier(STEP 301). The application may determine a drag-and-drop user inputbased on the pick-up-move-drop-down gesture (STEP 302). The applicationmay identify a first point on touch screen 201 that is opposite to thefirst location on the back-side surface for the pick-up-move-drop-downgesture. The application may identify a second point on touch screen 201that is opposite to the second location on the back-side surface for thepick-up-move-drop-down gesture. The application may, based on thedrag-and-drop user input, drag and drop a user interface object displayin touch screen 201 from the first point within touch screen 201 to thesecond point within touch screen 201 (STEP 303).

FIG. 4H illustrates an example three-dimensional trajectory of yetanother example three-dimensional gesture for the example method of FIG.3. In particular embodiments, a user may perform a sliding gesture withhis fingertip from a starting point 431 on touch screen 201, and lifthis fingertip away from touch screen 201 while following though on thesliding gesture, as illustrated by the arrow in FIG. 4H. An application(or an operating system) running on mobile device 200 may detect andrecognize (e.g., by subscribing as listeners to the three-dimensionalinput modules as described earlier) the three-dimensional trajectoryillustrated by the arrow in FIG. 4H as a fly-away gesture (STEP 301).The application may determine a fast-scrolling input based on thefly-away gesture (STEP 302). The application may, based on thefast-scrolling input, select scrollable user interface object (e.g., ascroll bar, a scrollable web page) at or near starting point 431 of thefly-away gesture, and scroll the scrollable user interface object at aspeed based at least in part on a velocity of the fly-away gesture (STEP303). For example, a user may perform with his fingertip a fly-awaygesture illustrated in FIG. 4H on a scrollable web page displayed intouch screen 201 by a web browser. The user's fingertip may move at aslower speed (e.g., 1 inch per second) while sliding on touch screen201, and at a higher speed (e.g., 5 inches per second) after lifting (orflicking) away from touch screen 201. In response to the fly-awaygesture performed by the user's fingertip, the web browser may scrollthe scrollable web page at the same pace with the user's fingertipsliding on touch screen 201 (e.g., 1 inch per second), and scroll at ahigher speed (e.g., 5 inches per second) after the user's fingertipflicking away from touch screen 201.

Particular embodiments may repeat the steps of the method of FIG. 3,where appropriate. Moreover, although this disclosure describes andillustrates particular steps of the method of FIG. 3 as occurring in aparticular order, this disclosure contemplates any suitable steps of themethod of FIG. 3 occurring in any suitable order. Furthermore, althoughthis disclosure describes and illustrates particular components,devices, or systems carrying out particular steps of the method of FIG.3, this disclosure contemplates any suitable combination of any suitablecomponents, devices, or systems carrying out any suitable steps of themethod of FIG. 3.

In particular embodiments, an application (or an operating system of thecomputing device) may store in a local storage of the computing device,a user preference file comprising user-specific data for the feature ofuser inputs with three-dimensional gestures as illustrated by theexample method of FIG. 3. For example, a user of the computing devicemay turn on or off the feature of user inputs with three-dimensionalgestures for the application, causing the application to store theuser's preference (e.g., the feature is turned off) in the userpreference file. For another example, the application may use a machinelearning algorithm to dynamically improve the accuracy of recognition ofa user's three-dimensional gestures, while storing in the userpreference file training data for the machine learning algorithm. Inparticular embodiments, the application may transmit and store the userpreference file in a remote server over the Internet (i.e., the userpreference file is hosted in the “cloud”). In particular embodiments,the user may access the user preference file (stored in the remoteserver over the Internet) from another computing device of the user.That is, the user preference file may be synchronized among some or allof the user's computing devices. For example, the user may turn off(from being turned on) the feature of user inputs with three-dimensionalgestures for the application on the user's mobile phone, causing theapplication to store the change in the local and remote copies of theuser preference file. As the user accesses the user's tablet computer,an application (or an operating system) running on the tablet computermay access the user preference file stored in the remote server and turnoff the feature of user inputs with three-dimensional gesturesaccordingly. Although this disclosure describes or illustratesparticular features being synchronized among multiple computing devicesof a user, this disclosure contemplates synchronizing any suitablenumber of any suitable features among any suitable computing devices ofthe user (e.g. by using user preference files as described above). Foranother example, the user may acquire a new mobile phone. An applicationor operating system running on the new mobile phone may access the userpreference file stored in the remote server for the training data fromthe user's existing (or previously owned) mobile phone (or anothercomputing device). Based on the training data, the application on thenew mobile phone may accurately recognize the user's three-dimensionalgestures, without further utilizing the machine learning algorithm.

In some embodiments, the feature of user inputs with three-dimensionalgestures (as illustrated by the example method of FIG. 3) may be turnedon or off on the user's computing device based on activities of theuser's social contacts in a social-networking system. For example, thefeature of user inputs with three-dimensional gestures on a user'scomputing device may be turned on if a number of the user's socialcontacts within a specified social distance (e.g., two degrees orseparation) exceeds a specified threshold (e.g., 10). For example, auser preference file (for the feature of user inputs withthree-dimensional gestures) described above may be stored with acorresponding user node in the social graph of the social-networkingsystem. An application on a particular user's computing device mayaccess the social graph, determine that more than 10 of the particularuser's first- and second-degree friends have the feature activated(turned on) on their respective computing devices, and turn on thefeature on the particular user's computing device accordingly. Theapplication may make a suggestion (within its user interface) to theparticular user about the feature, and turn on the feature based on theuser's confirmation. That is, the particular user may “discover” thefeature of user inputs with three-dimensional gestures, if more than 10of his first- and second-degree friends having the feature activated ontheir respective computing devices. Moreover, this disclosurecontemplates any suitable feature that may be turned on or off on auser's computing device based on activities of the user's socialcontacts in the social-networking system (e.g., by using user preferencefiles stored in the social graph as described above). Thesocial-networking system and social graph are described later.

A social-networking system, such as a social-networking website, mayenable its users to interact with it and with each other through it. Thesocial-networking system may create and store a record (such as a userprofile) associated with the user. The user profile may includedemographic information on the user, communication-channel informationfor the user, and personal interests of the user. The social-networkingsystem may also create and store a record of the user's relationshipswith other users in the social-networking system (e.g. a social graph),as well as provide social-networking services (e.g. wall-posts,photo-sharing, or instant-messaging) to facilitate social interactionbetween or among users in the social-networking system.

A social-networking system may store records of users and relationshipsbetween users in a social graph comprising a plurality of nodes and aplurality of edges connecting the nodes. The nodes may comprise aplurality of user nodes and a plurality of concept nodes. A user node ofthe social graph may correspond to a user of the social-networkingsystem. A user may be an individual (human user), an entity (e.g., anenterprise, business, or third party application), or a group (e.g., ofindividuals or entities). A user node corresponding to a user maycomprise information provided by the user and information gathered byvarious system, including the social-networking system. For example, theuser may provide his name, profile picture, city of residence, contactinformation (e.g., a phone number, an email address), birth date,gender, marital status, family status, employment, education background,preferences, interests, and other demographical information to beincluded in the user node. Each user node of the social graph maycorrespond to a web page (typically known as a profile page). Forexample, in response to a request including a user name, thesocial-networking system can access a user node corresponding to theuser name, and construct a profile page including the name, a profilepicture, and other information associated with the user. A concept nodemay correspond to a concept of the social-networking system. Forexample, a concept can represent a real-world entity, such as a movie, asong, a sports team, a celebrity, a restaurant, or a place or alocation. An administrative user of a concept node corresponding to aconcept may create the concept node by providing information of theconcept (e.g., by filling out an online form), causing thesocial-networking system to create a concept node comprising informationassociate with the concept. For example and without limitation,information associated with a concept can include a name or a title, oneor more images (e.g., an image of cover page of a book), a web site(e.g., an URL address) or contact information (e.g., a phone number, anemail address). Each concept node of the social graph may correspond toa web page. For example, in response to a request including a name, thesocial-networking system can access a concept node corresponding to thename, and construct a web page including the name and other informationassociated with the concept. An edge between a pair of nodes mayrepresent a relationship between the pair of nodes. For example, an edgebetween two user nodes can represent a friendship between two users. Forexample, the social-networking system may construct a web page (or astructured document) of a concept node (e.g., a restaurant, acelebrity), incorporating one or more selectable buttons (e.g., “like”,“check in”) in the web page. A user can access the page using a webbrowser hosted by the user's client device and select a selectablebutton, causing the client device to transmit to the social-networkingsystem a request to create an edge between a user node of the user and aconcept node of the concept, indicating a relationship between the userand the concept (e.g., the user checks in a restaurant, or the userlikes a celebrity). In addition, the degree of separation between anytwo nodes is defined as the minimum number of hops required to traversethe social graph from one node to the other. A degree of separationbetween two nodes can be considered a measure of relatedness between theusers or the concepts represented by the two nodes in the social graph.

A social-networking system may support a variety of applications, suchas photo sharing, on-line calendars and events, instant messaging, andadvertising. For example, the social-networking system may also includemedia sharing capabilities. For example, the social-networking systemmay allow users to post photographs and other multimedia files to auser's profile page (typically known as wall posts) or in a photo album,both of which may be accessible to other users of the social-networkingsystem. The social-networking system may also allow users to configureevents. For example, a first user may configure an event with attributesincluding time and date of the event, location of the event and otherusers invited to the event. The invited users may receive invitations tothe event and respond (such as by accepting the invitation or decliningit). Furthermore, the social-networking system may allow users tomaintain a personal calendar. Similarly to events, the calendar entriesmay include times, dates, locations and identities of other users.

FIG. 5 illustrates an example network environment of a social-networkingsystem. In particular embodiments, a social-networking system maycomprise one or more data stores 601. For example, each data store 601may comprise one or more storage devices. In particular embodiments, thesocial-networking system may store in data stores 601 a social graphcomprising user nodes, concept nodes, and edges between nodes asdescribed earlier. Each user node may comprise one or more data objectscorresponding to information associated with a user. Each concept nodemay comprise one or more data objects corresponding to informationassociated with a concept. Each edge between a pair of nodes maycomprise one or more data objects corresponding to informationassociated with a relationship between users (or between a user and aconcept, or between concepts) corresponding to the pair of nodes.

In particular embodiments, the social-networking system may comprise oneor more computing devices (e.g., servers) hosting functionality directedto operation of the social-networking system. In particular embodiments,one or more of data stores 601 may be operably connected to thesocial-networking system's front end 620. A user of thesocial-networking system may access the social-networking system using aclient device such as client device 622. In particular embodiments,front end 620 may interact with client device 622 through network cloud621. For example, front end 620 may be implemented in software programshosted by one or more computing devices of the social-networking system.Front end 620 may include web or HTTP server functionality, as well asother functionality, to allow users to access the social-networkingsystem.

Client device 622 may be a desktop computer, laptop computer, tabletcomputer, personal digital assistant (PDA), in- or out-of-car navigationsystem, smart phone or other cellular or mobile phone, or mobile gamingdevice, among other suitable computing devices. Client device 622 mayexecute one or more client applications, such as a web browser (e.g.,Microsoft Windows Internet Explorer, Mozilla Firefox, Apple Safari,Google Chrome, and Opera, etc.) or special-purpose client application(e.g., Facebook for iPhone, etc.), to access and view content over acomputer network.

Network cloud 621 may represent a network or collection of networks(such as the Internet, a corporate intranet, a virtual private network,a local area network, a wireless local area network, a cellular network,a wide area network, a metropolitan area network, or a combination oftwo or more such networks) over which client devices 622 may access thesocial network system.

In particular embodiments, the social-networking system may store indata stores 601 data associated with applications and services providedby the social-networking system. In particular embodiments, thesocial-networking system may store user event data in data stores 601.For example, a user may register a new event by accessing a clientapplication to define an event name, a time and a location, and causethe newly created event to be stored (e.g., as a concept node) in datastores 601. For example, a user may register with an existing event byaccessing a client application to confirming attending the event, andcause the confirmation to be stored in data stores 601. For example, thesocial-networking system may store the confirmation by creating an edgein a social graph between a user node corresponding to the user and aconcept node corresponding to the event, and store the edge in datastores 601.

FIG. 6 illustrates an example social graph 700. In the example of FIG.6, social graph 700 may include user nodes 701, concept nodes 702, andedges 703 between nodes. An edge 703 between a pair of nodes mayrepresent a relationship (or an action) between the pair of nodes. Forexample, user “B” is a friend of user “A” and user “C”, respectively, asillustrated by the edges between users nodes “B” and “A”, and betweenusers nodes “B” and “C.” For example, users “C” watches TV show“American Idol”, as illustrated by the edges between the “American Idol”concept node and user nodes “C.” Similarly, the edge between the usernode “B” and the concept node “Macy's” may indicate that user “B” likes“Macy's.” The edge between user node “B” and the “Cars” concept nodeindicates that user “B” watches the movie “Cars.” The edge between usernode “B” and the “S′more” concept node indicates that user “B” cooks therecipe “S'more.” The edge between user node “B” and the “Union Square”concept nodes indicates that user “B” checks in to “Union Square.” Theedge between user node “E” and the “American Idol” concept nodeindicates that user “E” likes TV show “American Idol.” Note that asocial graph can be much larger than social graph 700 illustrated inFIG. 6. For example, a social graph used by Facebook of Menlo Park,Calif. can have a number of nodes in the order of 10⁸, and a number ofedges in the order of 10¹⁰.

As described earlier, an edge between a pair of nodes may indicate adirect relationship between the pair of nodes. It is also desirable todetermine likelihood of a relationship or an interest between a pair ofnodes that are two or more hops away. For example, the social-workingsystem may provide (e.g., via an email or a wall-post) a recommendation(e.g., an advertisement) for “Macy's” to user “B”, given the directrelationship represented by the edge between the user node “B” and theconcept node “Macy's” as illustrated in FIG. 6. The social-networkingsystem may also provide a recommendation for “Macy's” to first-degreefriends of user “B” (e.g., users “C” and “A”) as first-degree friendsoften share comment interests.

FIG. 7 illustrates an example computer system 800, which may be usedwith some embodiments of the present invention. This disclosurecontemplates any suitable number of computer systems 800. Thisdisclosure contemplates computer system 800 taking any suitable physicalform. As example and not by way of limitation, computer system 800 maybe an embedded computer system, a system-on-chip (SOC), a desktopcomputer system, a mobile computer system, a game console, a mainframe,a mesh of computer systems, a server, or a combination of two or more ofthese. Where appropriate, computer system 800 may include one or morecomputer systems 800; be unitary or distributed; span multiplelocations; span multiple machines; or reside in a cloud, which mayinclude one or more cloud components in one or more networks. Whereappropriate, one or more computer systems 800 may perform withoutsubstantial spatial or temporal limitation one or more steps of one ormore methods described or illustrated herein. As an example and not byway of limitation, one or more computer systems 800 may perform in realtime or in batch mode one or more steps of one or more methods describedor illustrated herein. One or more computer systems 800 may perform atdifferent times or at different locations one or more steps of one ormore methods described or illustrated herein, where appropriate.

In particular embodiments, computer system 800 includes a processor 802,memory 804, storage 806, an input/output (I/O) interface 808, acommunication interface 810, and a bus 812. In particular embodiments,processor 802 includes hardware for executing instructions, such asthose making up a computer program. As an example and not by way oflimitation, to execute instructions, processor 802 may retrieve (orfetch) the instructions from an internal register, an internal cache,memory 804, or storage 806; decode and execute them; and then write oneor more results to an internal register, an internal cache, memory 804,or storage 806. In particular embodiments, processor 802 may include oneor more internal caches for data, instructions, or addresses. Inparticular embodiments, memory 804 includes main memory for storinginstructions for processor 802 to execute or data for processor 802 tooperate on. As an example and not by way of limitation, computer system800 may load instructions from storage 806 to memory 804. Processor 802may then load the instructions from memory 804 to an internal registeror internal cache. To execute the instructions, processor 802 mayretrieve the instructions from the internal register or internal cacheand decode them. During or after execution of the instructions,processor 802 may write one or more results (which may be intermediateor final results) to the internal register or internal cache. Processor802 may then write one or more of those results to memory 804. One ormore memory buses (which may each include an address bus and a data bus)may couple processor 802 to memory 804. Bus 812 may include one or morememory buses, as described below. In particular embodiments, one or morememory management units (MMUs) reside between processor 802 and memory804 and facilitate accesses to memory 804 requested by processor 802. Inparticular embodiments, memory 804 includes random access memory (RAM).This RAM may be volatile memory, where appropriate Where appropriate,this RAM may be dynamic RAM (DRAM) or static RAM (SRAM).

In particular embodiments, storage 806 includes mass storage for data orinstructions. As an example and not by way of limitation, storage 806may include an HDD, a floppy disk drive, flash memory, an optical disc,a magneto-optical disc, magnetic tape, or a Universal Serial Bus (USB)drive or a combination of two or more of these. Storage 806 may includeremovable or non-removable (or fixed) media, where appropriate. Storage806 may be internal or external to computer system 800, whereappropriate. In particular embodiments, storage 806 is non-volatile,solid-state memory. In particular embodiments, storage 806 includesread-only memory (ROM). Where appropriate, this ROM may bemask-programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), orflash memory or a combination of two or more of these.

In particular embodiments, I/O interface 808 includes hardware,software, or both providing one or more interfaces for communicationbetween computer system 800 and one or more I/O devices. Computer system800 may include one or more of these I/O devices, where appropriate. Oneor more of these I/O devices may enable communication between a personand computer system 800. As an example and not by way of limitation, anI/O device may include a keyboard, microphone, display, touch screen,mouse, speaker, camera, another suitable I/O device or a combination oftwo or more of these. An I/O device may include one or more sensors.This disclosure contemplates any suitable I/O devices and any suitableI/O interfaces 808 for them. Where appropriate, I/O interface 808 mayinclude one or more device or software drivers enabling processor 802 todrive one or more of these I/O devices. I/O interface 808 may includeone or more I/O interfaces 808, where appropriate. Although thisdisclosure describes and illustrates a particular I/O interface, thisdisclosure contemplates any suitable I/O interface.

In particular embodiments, communication interface 810 includeshardware, software, or both providing one or more interfaces forcommunication (such as, for example, packet-based communication) betweencomputer system 800 and one or more other computer systems 800 or one ormore networks. As an example and not by way of limitation, communicationinterface 810 may include a network interface controller (NIC) forcommunicating with an Ethernet or other wire-based network or a wirelessNIC (WNIC) for communicating with a wireless network, such as a WI-FInetwork. This disclosure contemplates any suitable network and anysuitable communication interface 810 for it. As an example and not byway of limitation, computer system 800 may communicate with an ad hocnetwork, a personal area network (PAN), a local area network (LAN), awide area network (WAN), a metropolitan area network (MAN), or one ormore portions of the Internet or a combination of two or more of these.One or more portions of one or more of these networks may be wired orwireless. As an example, computer system 800 may communicate with awireless PAN (WPAN) (e.g., a BLUETOOTH WPAN), a WI-FI network (e.g., a802.11a/b/g/n WI-FI network,), a WI-MAX network, a cellular network(e.g., a Global System for Mobile Communications (GSM) network, a LongTerm Evolution (LTE) network), or other suitable wireless network or acombination of two or more of these.

In particular embodiments, bus 812 includes hardware, software, or bothcoupling components of computer system 800 to each other. As an exampleand not by way of limitation, bus 812 may include an AcceleratedGraphics Port (AGP) or other graphics bus, an Enhanced Industry StandardArchitecture (EISA) bus, a front-side bus (FSB), a HYPERTRANSPORT (HT)interconnect, an INFINIBAND interconnect, a low-pin-count (LPC) bus, amemory bus, a Peripheral Component Interconnect Express or PCI-Expressbus, a serial advanced technology attachment (SATA) bus, aInter-Integrated Circuit (I2C) bus, a Secure Digital (SD) memoryinterface, a Secure Digital Input Output (SDIO) interface, a UniversalSerial Bus (USB) bus, a General Purpose Input/Output (GPIO) bus, oranother suitable bus or a combination of two or more of these. Bus 812may include one or more buses 812, where appropriate.

Herein, a computer-readable non-transitory storage medium or media mayinclude one or more semiconductor-based or other integrated circuits(ICs) (such, as for example, field-programmable gate arrays (FPGAs) orapplication-specific ICs (ASICs)), hard disk drives (HDDs), hybrid harddrives (HHDs), optical discs, optical disc drives (ODDs),magneto-optical discs, magneto-optical drives, floppy diskettes, floppydisk drives (FDDs), magnetic tapes, solid-state drives (SSDs),RAM-drives, SECURE DIGITAL cards or drives, any other suitablecomputer-readable non-transitory storage medium or media, or anysuitable combination of two or more of these, where appropriate. Acomputer-readable non-transitory storage medium or media may bevolatile, non-volatile, or a combination of volatile and non-volatile,where appropriate.

Herein, “or” is inclusive and not exclusive, unless expressly indicatedotherwise or indicated otherwise by context. Therefore, herein, “A or B”means “A, B, or both,” unless expressly indicated otherwise or indicatedotherwise by context. Moreover, “and” is both joint and several, unlessexpressly indicated otherwise or indicated otherwise by context.Therefore, herein, “A and B” means “A and B, jointly or severally,”unless expressly indicated otherwise or indicated otherwise by context.

This disclosure encompasses all changes, substitutions, variations,alterations, and modifications to the example embodiments herein that aperson having ordinary skill in the art would comprehend. Moreover,although this disclosure describes and illustrates respectiveembodiments herein as including particular components, elements,functions, operations, or steps, any of these embodiments may includeany combination or permutation of any of the components, elements,functions, operations, or steps described or illustrated anywhere hereinthat a person having ordinary skill in the art would comprehend.Furthermore, reference in the appended claims to an apparatus or systemor a component of an apparatus or system being adapted to, arranged to,capable of, configured to, enabled to, operable to, or operative toperform a particular function encompasses that apparatus, system,component, whether or not it or that particular function is activated,turned on, or unlocked, as long as that apparatus, system, or componentis so adapted, arranged, capable, configured, enabled, operable, oroperative.

What is claimed is:
 1. A method comprising, by a computing device:identifying a gesture made by a user of the computing device withrespect to one or more surfaces of the computing device, the gesturecomprising a single trajectory in three dimensions including: an earlierportion of the single trajectory in a first direction along at least oneof the surfaces, the earlier portion comprising a first series of pointstouching the at least one of the surfaces; and immediately following theearlier portion of the single trajectory, a later portion of the singletrajectory in a second direction, the later portion comprising a secondseries of points distant from the surfaces, wherein the second directioncomprises a deflection from the first direction that follows through onthe earlier portion of the single trajectory; determining a user inputbased at least in part on a speed of the gesture along the earlierportion of the single trajectory and a speed of the gesture along thelater portion of the single trajectory; and executing one or moreactions based on the user input.
 2. The method of claim 1, wherein thegesture is identified using a proximity sensor, camera, or touch sensorof the computing device.
 3. The method of claim 1, wherein the earlierportion is detected using a first sensor of the computing device andwherein the later portion is detected using a second sensor of thecomputing device.
 4. The method of claim 1, wherein: the gesturecomprises a pulling gesture on and then away from one of the surfaces ata first location of the one of the surfaces; and the actions comprise:selecting a user interface (UI) object within a display of the computingdevice at a first point within the display corresponding to the firstlocation; and adjusting a user-controllable parameter of an applicationon the computing device indicated by the UI object based on a distanceof an end point of the pulling gesture away from the one of thesurfaces.
 5. The method of claim 4, wherein the user-controllableparameter is a speaker volume or a display brightness.
 6. The method ofclaim 1, wherein the gesture comprises: a pinching gesture on one of thesurfaces at a first location of the one of the surfaces; a pullinggesture away from the one of the surfaces at the first location; amovement distant from and across the one of the surfaces toward a secondlocation of the one of the surfaces; and a dropping gesture on the oneof the surfaces at the second location.
 7. The method of claim 6,wherein the actions comprise dragging and dropping a user interface (UI)object within a display of the computing device from a first pointwithin the display corresponding to the first location to a second pointwithin the display corresponding to the second location.
 8. The methodof claim 6, wherein the first point is within a first window of a firstapplication on the computing device and the second point is within asecond window of a second application on the computing device.
 9. Themethod of claim 1, wherein: the gesture is a fly-away gesture; and theactions comprise: selecting a scrollable user interface (UI) object ator near a starting point of the fly-away gesture; and scrolling thescrollable UI object at a speed based at least in part on a velocity ofthe fly-away gesture.
 10. One or more computer-readable non-transitorystorage media embodying software that is operable when executed to:identify a gesture made by a user of a computing device with respect toone or more surfaces of the computing device, the gesture comprising asingle trajectory in three dimensions including: an earlier portion ofthe single trajectory in a first direction along at least one of thesurfaces, the earlier portion comprising a first series of pointstouching the at least one of the surfaces; and immediately following theearlier portion of the single trajectory, a later portion of the singletrajectory in a second direction, the later portion comprising a secondseries of points distant from the surfaces, wherein the second directioncomprises a deflection from the first direction that follows through onthe earlier portion of the single trajectory; determinine a user inputbased at least in part on a speed of the gesture along the earlierportion of the single trajectory and a speed of the gesture along thelater portion of the single trajectory; and execute one or more actionsbased on the user input.
 11. The media of claim 10, wherein the gestureis identified using a proximity sensor, camera, or touch sensor of thecomputing device.
 12. The media of claim 10, wherein the earlier portionis detected using a first sensor of the computing device and wherein thelater portion is detected using a second sensor of the computing device13. The media of claim 10, wherein: the gesture comprises a pullinggesture on and then away from one of the surfaces at a first location ofthe one of the surfaces; and the actions comprise: selecting a userinterface (UI) object within a display of the computing device at afirst point within the display corresponding to the first location; andadjusting a user-controllable parameter of an application on thecomputing device indicated by the UI object based on a distance of anend point of the pulling gesture away from the one of the surfaces. 14.The media of claim 10, wherein the gesture comprises: a pinching gestureon one of the surfaces at a first location of the one of the surfaces; apulling gesture away from the one of the surfaces at the first location;a movement distant from and across the one of the surfaces toward asecond location of the one of the surfaces; and a dropping gesture onthe one of the surfaces at the second location.
 15. The media of claim14, wherein the actions comprise dragging and dropping a user interface(UI) object within a display of the computing device from a first pointwithin the display corresponding to the first location to a second pointwithin the display corresponding to the second location.
 16. The mediaof claim 14, wherein the first point is within a first window of a firstapplication on the computing device and the second point is within asecond window of a second application on the computing device.
 17. Themedia of claim 10, wherein: the gesture is a fly-away gesture; and theactions comprise: selecting a scrollable user interface (UI) object ator near a starting point of the fly-away gesture; and scrolling thescrollable UI object at a speed based at least in part on a velocity ofthe fly-away gesture.
 18. A device comprising: one or more processors;and one or more computer-readable non-transitory storage media coupledto the processors and embodying software that is operable when executedby the processors to: identify a gesture made by a user of the devicewith respect to one or more surfaces of the device, the gesturecomprising a single trajectory in three dimensions including: an earlierportion of the single trajectory in a first direction along at least oneof the surfaces, the earlier portion comprising a first series of pointstouching the at least one of the surfaces; and immediately following theearlier portion of the single trajectory, a later portion of the singletrajectory in a second direction, the later portion comprising a secondseries of points distant from the surfaces, wherein the second directioncomprises a deflection from the first direction that follows through onthe earlier portion of the single trajectory; determining a user inputbased at least in part on a speed of the gesture along the earlierportion of the single trajectory and a speed of the gesture along thelater portion of the single trajectory; and execute one or more actionsbased on the user input.
 19. The device of claim 18, wherein the gestureis identified using a proximity sensor, camera, or touch sensor of thedevice.
 20. The device of claim 18, wherein the earlier portion isdetected using a first sensor of the device and wherein the laterportion is detected using a second sensor of the device.